Paper-pulp screen.



O. WANDEL.

PAPER PULP SCREEN.

APPLIGATION FILED M1013, 1909.

Patented Apr. 12, 1910.

3 SHEETSF-SHBET 1.

O. WANDEL.

PAPER PULP SCREEN. APPLICATION FILED 10110.13, 1909. l

955,025. Patented Apr. 12', 1910.

3 SHBETS-SEEBT 2.

0. WANDEL.

EAPEE PULP SCREEN.

APPLICATION FILED DEO.13, 1909. 955,025, Patnted Apr. 12, 1910.

3 SHEETS-SHEET 3.

`\ E Wi' Qmeesf Tizi/@m1729716 A 'l f UNITED sTATEs ,PATENT OFFICE.

oTTo WANDEL, or vvnnronr;MessiaenUsnTTs,V AssIGNon To WANDEL Muursc- TUBING comramna conronaTroN or massAcHUsnTTs.

' PAPER-PULP SCREEN.

Specification of Letters Patent. application meaneoemb'er 13, 1'eo9.serxa1m. 532,813.

Patented Apr. 12, 191e.

To all whom 'it may concern.' Be i .known that I, OTTO WANDEL, of Walpole, in thecounty ofNorfolk and l. State ofi Massachusetts, have invented certain I.new 4and useful Improvements in Paper- Pulp Screens, of which the following/is a speel cation, reference being had to the accompanying drawings, forming part thereof.

This invention has reference to improve- ;ments in machines for screening or strain- -ing fibrous material, usually delivered to the machine as ulp, and any similar material from which 1t is desired to remove im urities and, comparatively, 'large pieces o the material.

The object of the invention is toso construct a machine of this nature, provided with rotating screens, that said-screens may be positively driven in opposite directlons land positively lvibrated with reference tothe directions of rotation.

Another object of the inventionis to so construct a machine of this nature, having two'rotatable screens and means for rotating said screens in opposite directions that the finer and more useful material, .delivered lfrom said screens may fiow lntodllerent receptacles.

Other objects of the invention will appear from the following description.

The invention consists in such peculiar features of construction and combination lof parts as shall hereinafter be described and Apointed out in the claim. Q v

Figure 1, represents an end view lof th improved machine partly in section as on line 1-1 Fig. 2. Fi 2, represents a side elevation of parts of t e same. Fig. 3, repsents Va cross sectional view taken on line 3-3 Fig. 2, and showing receptacles for the liner pulp. Fig. 4, represents a diagrammatic view showing the manner of conductin pulp to and from the machine.

imilar characters of reference designate corresponding parts throughout.

As shown in the .drawings the main frame 5 of the machine sup lorts the vat 6, concave in cross section and aving the outlets 7, 7 located at its outer edges, and the centrally located outlet pipe 8. Pivotally mounted at both ends of the machine are pairs of rocker arms as 9, 9 having the buffer members 10, 10 with the buffer member 11 of the mainame to limit the swing of said rocker arms 9, 9n one direction, while the 'y opposite the sleeves 25, 26 of the lower ends of said rocker arms are furnished Wlth. cam faced blocks l12, 12 slidable on said arms and adapted to be secured in the'adI ]usted position by the bolts 13, 13'.

Journaled inv bearings in the main frame is the drive shaft 14 furnished with the gear.

15 and'havin'g throw cams as 16, actin .intermittently against the cam lfaces o the blocks 12, 12 to effect the movementof the rocker arms 9 9. mountedv on shaft 18, which latter 1s journaled in .bearings carried by the bracket -19 extending'frdm the main frame, and said shaft 18 is also furnished with the bevel gear 2O which engages and drives the similar gear 21 of thetransverse shaft 22, journaled in bearings of said bracket 19, having the worms 23, 24.

In bearings, at. the upper ends of the rocker arms 9, 9 are rotatably mounted the sleeves 25, 26 of .the cylindrical screens 27, 28. These screensha-ve slots formed in their walls, in any manner, therethrough of the liner furnished with longitudine ly extending Gear 15 engages gear 17` to permit the passage ulp and are strengthening rods 29., 30- secured v'to the screens. Rotation of said screens, in opp ositev directions, is effected by means of the annular i gears 31, 32 mounted on the sleeves 25, 26, o said screens, and engaged with the worms 23, 24.

Extending upward from end yframes 5 are the frame members 33, 34 having openings tive screens'in which o nin s are su rted b the cross bars 35 ggd 3%, pulp goiiioduits 3 and 38y having openings 1n their bottoms through which pulp is supplied within said screens 27 and 28. The upper ends of said frame members `33, 34 extend above the screens 27, 28 and to these ends are secured the su porting members 39, 40 offthe perforated pipes 41, 42 which are adapted to Ydeliver water to the upper surfaces of the respectivescreens 27, 28, and are provided with hoods 43, 44. 'Within said screens 27 28 are located the waste receiving trays 45, 46, positioned above the ulp supply conduits 37, 38 and adapte` -to receive the waste material and dirt washed from the screens 27 28 as such material is carried beneath the jets of water ing downward f rom the plpes 41, 42. e coarse material, carried around within the screens also beingthus lwashed into said trays 45, 46 and passdioated by arrows in vibration of said arms, the inward movetative movement in o 'ment of which is limited by the coperating buffer members 10 and 11, -so that the screens 27, 28, supported on said rocker arms, are constantly vibrated during their said roposit/e directions. Paper pulp, carrie 1n solutionwith water, passes into the screens 27, 28 through the troughs 37 and 38 and is deliveredythrough the openings in the bottoms of said troughs,

to the. lower rtions of said screens whence the water, with the finer parts of the pulp,

passes through the slots in said screens andV enters the vat 6. Those ortions of the screens which are immerse act, by reason of the rotation of said screens in'opposite directions, to effect circulation of the water, which carries the finer material toward the oppositely disposed outlets 7 and 7 from which said finer -pulp'is delivered respec- 4 tively to vessels (a) and (b). The coarser material, which cannot pass through the slots in screens 27, 28, and a large propor tion ofthe scum and dirt contained within the screens settles or is collected, between the bars 29, 29 and is carried upward, by the rotation of the screens, until' it is brought beneath the jets of water from pipes 41, 42 and is then washed from the screens into the tra s 45, 46 and asses out of the machine.

y the use of 's machine the finer material paing from the screens 27, 28 ino posite directions does'not mix with any ment which may collect between the screens above the outlet 8, as would be the case if the vat 6 had but one outlet'and both screens were rotated in the same direction.

V Having thus described my invention I claim as new and desire tosecure by Letters Patent Apaper Eulp screen com risinga`vat, a pair of roc er arms pivoteI ly mounted on said vat and having dependin members furnished with adjustable cam b ocks and buf fer members, a bu'er member fixed with relation to said buer members of the rocker.

arms, cylindrical screens journaled in bearings of said rocker arms and rotating with in said vat, said screens having annular gears, a drive shaft journaled in bearings of the machine and havin a cam adapted to act on the cam blocks o said rocker arms, a

ear on said shaft, an intermediate shaft `Journaled in bearings and having a gear engaged with the gear of said drive shaft and v a bevel gear, driven from the bevel gear of the intermediate shaft, and a air` of worms engaged with the ears of sai screens, substantially as desem OTTO WANDEL. Witnesses:

Enw. L. FLEMING, H. L. GODDARD. 

